(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

a) if a force of 86N parallel to the surface of a 20 degree incline plane will push a 120N block up the plane at constant speed, what force parallel to the plane will push it down at constant speed?

2. Relevant equations

[tex]\Sigma[/tex]F(X)=F(A)-F(fr)-mgcos[tex]\vartheta[/tex]=0

[tex]\Sigma[/tex]F(Y)=F(n)-mgsin[tex]\vartheta[/tex]=o

where F(A)= force applied, F(fr)= friction force, F(n)= normal force, mg=weight, F(X)= sum of forces in x direction, and F(Y)- sum of forces in y direction

3. The attempt at a solution

normal force=41.0424

friction force=26.73

my answer is -86.0331

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# Homework Help: Force needed to push box down incline plane

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